if you've got a hill or valley and there's a cart on wheels it's going to go down to the bottom.

如果我们有一座山或者山谷，并且,有一个有轮子的车，这辆车会自动滑到底部。

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So you got like a surfboard-shaped board and put wheels on it, so they could ride it.

找一块冲浪板形状的板子，加上轮子，就可以滑了。

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If you were the only guy with wheels on your suitcase, people would think you look a little odd.

如果你是唯一一个箱子上带轮子的人，人们可能会觉得你有点古怪。

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The image we get there is that the Israelites are working their way through the marsh on foot, and the Egyptians' chariot wheels can't make it through the marsh.

我们所得到的印象是，犹太人徒步走过沼泽,而埃及人因为坐在马车上,所以无法穿过沼泽。

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This suitcase had--instead of having four little wheels on the bottom, it had two wheels on the back.

这种旅行箱不是四个轮子都在底部，而是在后面有两个轮子。

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He had a suitcase that--I don't know exactly, something like this--had a strap that you'd pull it along and it had four little wheels on the bottom and it worked.

他的行李箱。。。我知道的不太确切，应该是这样的，那上面有一条带子,你可以拉着它,而箱子底部有四个小轮子可以使箱子滑动。

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The idea of putting wheels on suitcases goes back only to 1972 and it was Bernard Sadow who invented-- this is amazing, right--the wheeled suitcase and he got a patent on it.

在行李箱上加轮子的想法,可以追溯到1972年2,是伯纳德？沙度发明的-,这很神奇，对吧,并且他凭此获得了专利。

耶鲁公开课 - 金融市场课程节选

So my student called Bernard Sadow up and asked him about his invention and he said, "Yeah, I was thinking, why don't we have wheels on suitcases?

于是我的学生打电话给伯纳德？沙度,然后询问了他关于发明的事情，他说道，是啊，我当时在想，我们为什么不能在行李箱上安轮子呢？

耶鲁公开课 - 金融市场课程节选